(a) In the event the individual resumes employment with the Federal Government, the entire time during which the employee was receiving compensation under this chapter shall be credited to the employee for the purposes of within-grade step increases, retention purposes, and other rights and benefits based upon length of service.

(b) Under regulations issued by the Office of Personnel Management—

(1) the department or agency which was the last employer shall immediately and unconditionally accord the employee, if the injury or disability has been overcome within one year after the date of commencement of compensation or from the time compensable disability recurs if the recurrence begins after the injured employee resumes regular full-time employment with the United States, the right to resume his former or an equivalent position, as well as all other attendant rights which the employee would have had, or acquired, in his former position had he not been injured or disabled, including the rights to tenure, promotion, and safeguards in reductions-in-force procedures, and

(2) the department or agency which was the last employer shall, if the injury or disability is overcome within a period of more than one year after the date of commencement of compensation, make all reasonable efforts to place, and accord priority to placing, the employee in his former or equivalent position within such department or agency, or within any other department or agency.